Adir Hu (English: Mighty is He, Hebrew אדיר הוּא) is a hymn sung by Ashkenazi Jews worldwide at the Passover Seder.
[2] The tune of Adir Hu has gone through several variations over the years, but its origin is from the German minnesinger period.
[citation needed] The earliest existing music for Adir Hu is found in the 1644 "Rittangel Hagada".
A traditional German greeting on the night of Passover after leaving the synagogue was "Bau Gut" ("build well"), a reference to Adir Hu.
[6][7] Menachem Mendel Kasher points out that it is in fact unclear whether the Yiddish or the Hebrew version is original.